Thứ Bảy, 30 tháng 5, 2009

Cách tạo Username và password khi máy khác truy nhập vào qua LAN

Cách 1:
Cách đơn giản để không cho máy khác truy cập vào một máy trong mạng Lan. Bạn chạy Computer Management (trong Control Panel - Administrative Tools). Vào User trong Local user and Groups, trong User có nhiều tài khoản người dùng bạn Set password cho tài khoản Guest bằng cách click phải chuột. (Nhớ vào Guest Properties không chọn Account is disabled).

Bất cứ máy nào trong Lan muốn truy cập vào máy bạn vừa Set password cho Guest điều bị hỏi phải nhập pass cả. Các máy trong Lan vẫn share bình thường nhé.

Cách 2:
Mặc định WinXP chứng thực theo cơ chế Guest Only, nhưng trong WinXP thì user guest lại bị disable. Bạn phải vào Policy để chuyển sang chế độ chứng thực Classic:
start-> Run -> gpedit.msc ( enter )
Computer configuration -> Windows setting -> security setting -> local policy -> security option -> Network access sharing and security model for local account
Chọn classic ...
Nhớ cập nhật policy: Run -> cmd (enter) gpupdate /force (enter)
Lưu ý: account phải có password. Nếu username và pass của 2 máy giống nhau thì chứng thực bằng current user( tức ko có hỏi username và pass). Điều này có nghĩa là sau khi tạo Account bạn phải tạo password sao cho khác với tất cả các máy còn lại trong mạng LAN.
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Resetting the BIOS Password using Software

Every system must store the BIOS password information somewhere. If you are able to access the machine after it has been booted successfully, you may be able to view the BIOS password. You must know the memory address where the BIOS password is stored, and the format in which the BIOS password is stored. Or, you must have a program that knows these things.

You can write your own program to read the BIOS password from the CMOS memory on a PC by writing the address of the byte of CMOS memory that you wish to read in port 0x370, and then reading the contents of port 0x371.

!BIOS will recover the BIOS password for most common BIOS versions, including IBM, American Megatrends Inc, Award and Phoenix.

CmosPwd will recover the BIOS password for the following BIOS versions:

  • ACER/IBM BIOS
  • AMI BIOS
  • AMI WinBIOS 2.5
  • Award 4.5x/4.6x/6.0
  • Compaq (1992)
  • Compaq (New version)
  • IBM (PS/2, Activa, Thinkpad)
  • Packard Bell
  • Phoenix 1.00.09.AC0 (1994), a486 1.03, 1.04, 1.10 A03, 4.05 rev 1.02.943, 4.06 rev 1.13.1107
  • Phoenix 4 release 6 (User)
  • Gateway Solo - Phoenix 4.0 release 6
  • Toshiba
  • Zenith AMI

Resetting the BIOS Password using Hardware

If you cannot access the machine after if has been powered up, it is still possible to get past the BIOS password. The BIOS password is stored in CMOS memory that is maintained while the PC is powered off by a small battery, which is attached to the motherboard. If you remove this battery, all CMOS information (including the BIOS password) will be lost. You will need to re-enter the correct CMOS setup information to use the machine. The machines owner or user will most likely be alarmed when it is discovered that the BIOS password has been deleted.

On some motherboards, the battery is soldered to the motherboard, making it difficult to remove. If this is the case, you have another alternative. Somewhere on the motherboard you should find a jumper that will clear the BIOS password. If you have the motherboard documentation, you will know where that jumper is. If not, the jumper may be labeled on the motherboard. If you are not fortunate enough for either of these to be the case, you may be able to guess which jumper is the correct jumper. This jumper is usually standing alone near the battery. If you cannot locate this jumper, you might short both of the points where the battery connects to the motherboard.

If all else fails, you may have to clear the BIOS password by resetting the RTC (Real Time Clock) IC (Integrated Circuit) on your motherboard.

Many RTC's require an external battery. If your RTC is one of this type, you can clear the BIOS password just by unsocketing the RTC and reseating it.

RTC's which require external batteries include:

Most RTC chips with integrated batteries can be reset to clear the BIOS password by shorting two pins together for a few seconds.

You will see more than one option for some chips due to testing by various people in the field. Remember to remove power from the system before shorting these pins.

RTC ChipPins
Dallas DS1287A
TI benchmarq bp3287AMT		3 (N.C.) and 21 (NC/RCL)
Chips & Technologies P82C20612 (GND) and 32 (5V)
-or-
74 (GND) and 75 (5V)
OPTi F82C2063 and 26
Dallas Semiconductor DS12887A3 (N.C.) and 21 (RCLR)

You should be able to discover how to reset the BIOS password stored in most RTC (Real Time Clock) chips by reading the manufacturers data sheet for that RTC. Some RTC's, like the Dallas DS1287 and TI benchmarq bq3287mt cannot be cleared. The solution to resetting the BIOS password on systems with those RTC's is to purchase a replacement RTC chip. How inconvenient!

Vendor Specific Solutions for Resetting the BIOS Password

Resetting a Dell BIOS Password

For information on how to recover a Dell BIOS password, please refer to How do I reset a Dell BIOS password?

Resetting a Toshiba BIOS Password

KeyDisk will reset the BIOS password on Toshiba laptops.

Older Toshiba laptops can be convinced to boot without their power-on BIOS password by attaching a dongle to the parallel port which crosses a number of the pins. The pin out is:

Pins
1-5-10
2-11
3-17
4-12
6-16
7-13
8-14
9-15

Some Toshiba's can be convinced to bypass the startup BIOS password if you hold down the key while booting the system.

Resetting an IBM ThinkPad BIOS Password

For information on how to recover an IBM Thinkpad BIOS password, please refer to How do I reset an IBM ThinkPad BIOS password?

Resetting an IBM Aptiva BIOS Password

Some IBM Aptiva's can be convinced to bypass the startup BIOS password if you press both mouse buttons repeatedly while booting the system.

Resetting an Acer BIOS Password

For information on how to recover an Acer BIOS password, please refer to How do I reset an Acer BIOS password?


PHÁ PASS BIOS


Dùng Tool sau nè
1.CmosPwd by CGSecurity
http://www.cgsecurity.org/cmospwd-5.0.zi...

2.!Bios by eleventh alliance
http://www.11a.nu/wp-content/uploads/200...

Dùng trong win luôn khỏi cần tháo máy

ĐỐI VỚI PHẦN MỀM THỨ 2

Sau khi kích hoạt phần mềm huynh đệ sẽ thấy các menu thông báo các thông số cho main hay gì đó ... Ngoài ra có thể lựa chọn " crack " và lựa chọn kiểu bios ।Lúc này sẽ ko sử dụng được chuột mà chỉ sử dụng được phím mũi tên

Lúc này sẽ hiện ra danh sách các loại bios .Nếu huynh đệ ko rõ máy của mình dùng loai bios nào thì hãy thử tất nhé



Chương trình cũng cung cấp một số mật khẩu mặc đinh của các loại bios .Huynh đệ có thể vào menu docs > pass > enter

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